High-pressure reciprocating piston compressor



June 24, 1930. c. SCHAER 1,767,404

HIGH PRESSURE RECIPROCATING PISTON COMPRESSOR Filed Feb- 5, 1928 3 Sheets-Sheet INEM-m F\ @Wdh BY p R MOWMM AT1-m |=\r\l Ys v/JJIIII'IIMIHNII F 9T R RR ,i F 5m a c. scHAER l,7(:' 7,4(4v

HIGH PRESSURE RECIPROCATING PISTON COMPRESSOR June 24, 1930.

, 3 Sheets-Sheet 2 Filed Feb. 5, 1928 @mi ,I @W )MMLCIMML AT1-URN BVS June 24, 1930. c. SCHAER 1,767,404

HIGH PRESSURE REGIPROCATING PISTON COMPRESSOR FiledFeb. 5, 192e s sheets-sheet s Patented June24, 1930 SULZER FRERES SOCIT ANONYME; on WINTERTHUR, SWITZERLAND mennnssonii nn'cnitocnime ristrorilcoivrrnnssolt i Application filed retuary 3, i928', sleria1'Nd.'251,714, miem switzerland June v8,519.27". Y'

This invention relates to 'high pressure piston or reciprocating vcfunpressors or the Vlike of thekind-inwhichthe working pis` tons of the` compressor or their. intermediate r@pistons V4-are actuated byv drivin'g pistons which are preferably exposed jon both faces tothe action of a column 'of `li ';[uid` 'l The output of such compressors-has hitherto been limited by the dimensions of Mythe last stage and not by theV power ofthe Vdriving apparatus,- the'dimensions of vthe last stage v,being themselves limited the question ofpacking the working piston ,and stuffing boxes.' Infact, as fregardsthe lat- 15 ter there is a denite diameter, w'hic'l'if'eX-` Yceeded,l cannot be" efficiently meansat present available-1 The`=invention has ffor itsobject `to-provide an improved construction of su'ch comsimplifyingth'ejdrivingmechanism.l i

According to the presentv invention "at obviated and-the y"outputincreased while least two driving pistons vreslgectively vact'u'-V l i' '25' ate the individual'jworling jpistonsf of two or more'compressor cylinders arranged yin parallel for the purpose of` increasingA the throughout the remainder of the j description,

`is intended toV be meant4 the arrangement of the Cylinders' whereby 'they ylrat,'in-the saine Stage." S s.

' 35 Theiiquid Columns which acetate@ in: `termediatel pistons of r'these cylinders i areV preferably allI actuated `by one Vand the' same pistonV of lthe driving machine. The cylin- 'ders maybe arranged in pairs` and the in- 40 termediate pistons ofea'ch -paima'y be con-` nected by?V a column' "of liquid disposed in l the 'same plane asthat'fifn'whi'rzh` is disposed the column ofvliquid connecting one'of''the pair ofy intermediate pistonsl the corj 4D responding `piston of the driving fmachi'ne.

t transverse-tothe planefinifwhich isdi's" VVed lof intermediate pistons the-working pistons of posed above the said piston.

packed with the s nected tothe ,crank l rseotshown) ,i Y necting.rodA 2. In the cylinders 13, vr14k, '15

,and 16 are i and thev corresponding piston ofthe driving'machinel low the pistonv` of the driving machine while A few constructional examples `of the in- *vention vare illustrated diagrammatically-by f way'of example in thel accompanying: draw- Figure Aleshows two stages, the two uppermost stages, of a piston compressor, Ain Esentir-ur on -Qa centrali! plane', l l

Figures 2,4and G'Ishow modifications of thearrangementV of- Fi'gurel, v

Figurev` 3 shows lasection on'l the lineI-I `oflFigre 2,`and' f v Y' zopressorsfin which-'these disadvantagesare Ijlfor III-JH of Figurekik In thegcoestmceon illustrated' in Figure llthe movement of the liquid columns within fthe'rcylinders' 8, 9 and `l0 isy effected by Adouble#actin-g primary f `pistons 5; l6 vand 7 a pistonfrod' 4e which is "con of the `driving machine mounted ori through a crosshead 3 and confthe` others are; dis- Y providedfltheintermediatepis- 1t-ons' 19` 20mi-anu eafmechapicailyl een; 1 "nec/ted to the compressor lpistons y23, V24,1125,

and 26 respectively, which actk on "the ine;` l iunij to becompressed` the cylinders! 27,A 5 28,' 29v andj30` ofthe-second last stage; *f ln fthe cylinders 1.1"and12 ofthelaststagefare ,l y `mounted 'intermediate pistons 17 andflS me- Y The'arrangement of the cylinders which 7, are in parallel 'may also be such vthat the rWorking pistons of 'some are'`disposed7loe for example V"ehanically` connectedto the worlingorcomg :V presserfpistonsBI-and 32"of1the compressor cylinders vand SAQ Between the-pistons' 5,16 land A7` of the driving machine" and one -faq'e-of'Gatherthepistensfiv;11e, 19,120, 21Y

andjQQ are provided liquid fcoluinnsjf, 36,

ery valves 49` and 50 for the cylinders 30 and 29 of this stage being connected to the suction pipe 51 and the suction valve 52 for the cylinder 34 of the last stage of the compressor, whilst the delivery valves 53 andV 54 for the cylinders 28 and 27 are connected to the suction pipe 55 and the suction valve 56 for the cylinder 33 of the last stage. 'stage leads from the delivery valves 57 .and 58 for the cylinders 34 and 33 to the point of consumption of the compressed gas. The liquid columns between the adjacent intermediate pistons are arranged in the same plane as the liquid columns between one intermediate piston and thev corresponding piston of the driving machine.,

' The pistons l the pistons 6 and-7 of the driving machine, cause the compressor pistons 23, 24, and 26 to act on the medium within the cylinders 27, 28, 29 and 30 respectively which are arranged in parallel, while the pistons 17 and .18 actuated by the piston 5 cause the compressor y pistons 31 and 32 to act on the medium within the cylinders 33 and 34 respectively, which are also arranged in paral- .lel. 1 Y

icent intermedia-te' pistonscrossesfthe axis 'of- The construction shown in Figures 2 and 3 differs from thatfshownin Figure 1 in that the-piston' of the driving machine is made in the form offa differential piston, ofwhich the llarger, portion 60 acts on the intermediate pistons of thefcylinders 61 and .62 of the sixth stage, while the smaller portion 63 actuates the intermediate pistons' of the cylinders 64` and 65. `r The pistons 66 and-67 of the cylinders 64 and65 of the last stage, actuatedL through the liquidcolumns 68 and 69 by the pistons 63 ofthe driving machine and connected by the liquid `col-` umn 70, actuatethe compressor pistons 71 and 72 -of the cylinders 73and 74 which are arranged i-n parallel.V fThepistons 75 andI 7 6 l. V(Figure 3)k which, aslshown in Figure 2,

Aare actuated through` the-liquid columns 77 and 7 8l bythe-piston 60 of the driving machine/and` are connected by theV liquidcolumn79, act in-a similar manner on the com- .pressor pistons ofthe cylinders'80 and 81 which l are also-arranged in parallel. The supplyfto the suction valves is eiiected by the pipe 82,whilst Jthe discharge takes place '---VVhereas m- Figures 3' the liquid parallel to-that-vin which is disposed Athe .f piston oi'` the; driving machine, Figures 4 andV rfshow a construction 'in whichtheaxi'sll cfg-.the liquid column "86 e between two fadj athe fpistons 87 -and- 88 oft' the Y.driving ma- The delivery pipe 59 for the last` 19, 20 21 and 22 actuatedby pistons,

-termediateI pistons, a

inders`106 and 107 are arranged in parallel Aas are also the cylinders 108 and 109. The operation of the compressor depends, as in the previous eXamples,on the alternating action of the liquid column 110 actuated by the piston 1705 of the driving machine and the 'connecting columns 111 and 112 located between the pistons 101 and 102, and 103 and 104 respectively.

rEhe invention enables the outputol the known type of compressor to be doubled in spite of the fact that the driving mechanism is Vconsiderably simplified whilst theplunger diameter may remain the sameas be- `tore. The-diameter of 'the stuffing boxes shown only diagrammatically does netbecome excessive and the reduction in the-dimensions reduces the extent to which'the packing heats y can be more readilyidissipated.- VIn addition expansion due tov heat is reduced and the play` between the piston 'and the packing elements is therefore less. f j f e Iclaim: i 1. In a high pressure reciprocating comup, Vso thatyfrictional heat pressor, the combination with a positively actuated primary piston, of a plurality of intermediate pistons,',a ,plurality of compressor `.pistons 'arranged in parallel and eachactuated Vjby one Y ot said vintermediate an oscillating column ofv liquid between one side of said primary v,piston and vone of said intermediate pistons,an oscillating liquid oolumnbetween the other side of said primarypistonand yanother of said intermediatepistons,A

and an oscillating liquid columnbetw'een saidintermediate pistons.

{2. In'a .high pressure reciprocating com `pressor, the combination with af plurality of positively' actuated" primary pistons,H of" a plurality of intermediate pistons,

a pluralityl of compressor pistons arranged in parallel and each -ate pistons, andan oscillating liquid column between the' lirst and last named ofl saidintermediate pistons.

, Y ressor, the combination with a horizontally disposedipositivelyf actuated primary# piston, ofa plurality of vertically,disposedginplurality 'of compressor pistons arrangedein--parallel and each actuated lvby' one of, -saifd intermediate', pisactuated by one of lsaid intermediate-pistons, an oscillating'columnof 3. In a1 high Y pressure reciprocating coin-Y tons, an oscillating column of liquid between one side of said primary pistonand one of' said intermediate pistons, an oscillating liquid column between the other side of said,

each actuated by one of said intermediate pistons, an oscillating column of liquid between one side of each of said primary pistons and one of said intermediate pistons, an oscillating liquid column between the other side of each of said primary-pistons and another of said intermediate pistons, and an oscillating liquid column between the first and last named ot' said intermediate pistons.y

5. VIn a high` pressure reciprocating compressor, the combination with a horizontally disposed positively vactuated vprimary piston,

of a plurality of vertically disposed intermediate pistons,"a plurality of compressor, pistons arranged in parallelpairs and each actuated by one of said intermediate pistons, an oscillating column of liquid between one side of said primary piston and one of said intermediate pistons, anoscillating liquid column between the other side ot said primary piston and anotherl of said intermediate pistons, and an oscillating liquid column between said'. intermediate pistons, said'last named column being disposed -in the same plane assaid -first named columns.

6. In a high pressure*reciprocatingcoinpressor, the combination with a horizontally vdisposed positively actuated primary piston,

of a plurality of vertically disposed interme j diate pistons, a plurality of compressor pis-k tons arranged in parallel pairs and each actuated by one of said intermediatepistons,

an oscillating'column of liquidbetween one v side of said primary'piston and one ofl said intermediate pistons, 'an oscillating` liquid Y column between the other'side of said pri#` mary piston and another of said intermediate pistone-and an oscillating liquid'column between said intermediate pistons, said lasts intermediate pistons, an oscillating liquid column between the other side of said primary piston and another of said interinediate pistons, and an oscillating liquid column between the said intermediate pistons, .e said last named column being disposed in the same plane as said first named columns.

8.- In a'highpressure reciprocating'compressor, the combination with` a plurality of horizontally disposed positively actuated primary pistons,1of a plurality of vertically disposed intermediatepistons, a plurality of compressor pistons arranged in parallel pairs and eachactuatedby one of said 'intermediate pistons, an voscillating columnv of' liquid between one side of each of said primary pistons and one .ofsaid intermediater pistons, an oscillating liquid column between the other side of each of said vprimary pis? `tons and another of said intermediate pistons, and an" oscillating liquid Vcolumn be. 1

ing disposed in the saine named columns. .Y .l -Y

9. In ahigh pressurereciprocating compressor, the combination with a plurality of vplane as said first horizontally disposed positively actuatedV primary pistons, of a plurality of vertically disposed intermediate pistons, a plurality of mediate pistons, kan oscillating columnl ot liquid between one side of each of said primary pistons and one of said intermediate pistons, an oscillating liquid column be-l n tweentheother side of each vof'said primary g Y pistons `and another of said intermediate `tween thefirst and last named ofsaid intermediate pistons, said last named column be.

ycompressor pistons arranged in parallel l. pairs and each actuated by one of said interpistons, and an oscillating liquid `column bev tween ,thev first and last named otsaid intermediate pistons, said last named column being disposed `ina plane parallel to that in which are disposed'said :[irst namedjcolumns. f In testimony whereof Ihave affixed my signature. I Y CHARLES SCHAER.v l

named column.V being disposed ina plane Y 'parallel to that in which' are disposed saidy .i

first named columnsVV p y i. .7 In a high .pressure reciprocating compressor, the combination with a'horizontally Y i disposed positively actuatedprimarypiston, I

ofa plurality ofV vertically `disposed inter-'fv f mediate pistons, a? plurality of compressor pistonsarranged in parallel pairs above and Y below said intermediate pistons and each actuated by one ofsaidintermediate pistons, i e

an oscillating columnfof kliquid. between one side of said' primary piston and one of said l 

